/Engine/Source/Editor/MeshPaint/Public/MeshPaintHelpers.h
Propagates per-instance vertex colors to the underlying Static Mesh for the given LODIndex
static bool PropagateColorsToRawMesh ( [UStaticMesh](API\Runtime\Engine\Engine\UStaticMesh) * StaticMesh, int32 LODIndex, [FStaticMeshComponentLODInfo](API\Runtime\Engine\FStaticMeshComponentLODInfo) & ComponentLODInfo )